Cordovan posted on the forums about some upcoming downtime:
The DDO Game Servers will be brought down on Wednesday, March 2nd from 9:00 AM – 12:00 PM Eastern (-5 GMT) for a hotfix. Thanks for your patience, and we’ll see you back in the game soon!
This hotfix will correct an issue with several doors that are making it difficult or impossible to complete several quests, add a handful of items to the 10th Anniversary gift list, fix the Lesser Dragonmark of Scribing, get the Arcane Archer’s Final Strike working correctly, and possibly correct the sound issue with chests and loot.
He added a reply in the thread as to new rewards that are being added
A cosmetic Robe of Winter Ice, the heroic Sword of Shadow, Cloudburst, and an auto-consume 100,000 XP gem.